Sign up for newsletters

POST https://{project_url}/webservice/rest-api/{api_interface}/{version}/customers/actions/newsletters-sign-up

Sign up a contact for the newsletter. The contact does not need to be an existing customer.
⚠️ We strongly recommend verifying the contact with CAPTCHA before sending a request to CareCloud API.

Partner assignment

When a contact is signed up, CareCloud creates one or more customer-partner relations. The assignment is determined as follows:

• If partner_records is provided (non-empty array) - relations are created for exactly those partners.
• If partner_records is an empty array ([]) - no partner relations are created.
• If partner_records is omitted - relations are created for all partners accessible to the authenticated API user.

Because this endpoint returns no customer ID, partner assignment cannot be managed after the call. Use partner_records to control assignment at sign-up time.